1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>do_signal_stop</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="ch01s07.html" title="Internal Functions"><link rel="prev" href="API-do-notify-parent-cldstop.html" title="do_notify_parent_cldstop"><link rel="next" href="API-do-jobctl-trap.html" title="do_jobctl_trap"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">do_signal_stop</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-do-notify-parent-cldstop.html">Prev</a>&#160;</td><th width="60%" align="center">Internal Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-do-jobctl-trap.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-do-signal-stop"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>do_signal_stop &#8212; 
2     handle group stop for SIGSTOP and other stop signals
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">bool <b class="fsfunc">do_signal_stop </b>(</code></td><td>int <var class="pdparam">signr</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1107921012"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>signr</code></em></span></dt><dd><p>
4     signr causing group stop if initiating
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1107922644"></a><h2>Description</h2><p>
6   If <code class="constant">JOBCTL_STOP_PENDING</code> is not set yet, initiate group stop with <em class="parameter"><code>signr</code></em>
7   and participate in it.  If already set, participate in the existing
8   group stop.  If participated in a group stop (and thus slept), <code class="constant">true</code> is
9   returned with siglock released.
10   </p><p>
11
12   If ptraced, this function doesn't handle stop itself.  Instead,
13   <code class="constant">JOBCTL_TRAP_STOP</code> is scheduled and <code class="constant">false</code> is returned with siglock
14   untouched.  The caller must ensure that INTERRUPT trap handling takes
15   places afterwards.
16</p></div><div class="refsect1"><a name="idp1107925044"></a><h2>CONTEXT</h2><p>
17   Must be called with <em class="parameter"><code>current</code></em>-&gt;sighand-&gt;siglock held, which is released
18   on <code class="constant">true</code> return.
19</p></div><div class="refsect1"><a name="idp1107926356"></a><h2>RETURNS</h2><p>
20   <code class="constant">false</code> if group stop is already cancelled or ptrace trap is scheduled.
21   <code class="constant">true</code> if participated in group stop.
22</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-do-notify-parent-cldstop.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch01s07.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-do-jobctl-trap.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">do_notify_parent_cldstop</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">do_jobctl_trap</span></td></tr></table></div></body></html>
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